US9380654B2 - Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps - Google Patents

Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps Download PDF

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Publication number
US9380654B2
US9380654B2 US13/939,245 US201313939245A US9380654B2 US 9380654 B2 US9380654 B2 US 9380654B2 US 201313939245 A US201313939245 A US 201313939245A US 9380654 B2 US9380654 B2 US 9380654B2
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United States
Prior art keywords
led
ballast
circuit
input
transformer
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US13/939,245
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US20150015150A1 (en
Inventor
Peter Dankovits
Krisztian Novak
Peter Zalka
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Ally Bank As Collateral Agent
Atlantic Park Strategic Capital Fund LP Collateral Agent AS
GE Hungary Kft
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General Electric Co
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Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GE HUNGARY KFT.
Assigned to GE HUNGARY KFT. reassignment GE HUNGARY KFT. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DANKOVITS, Peter, NOVAK, Krisztian, ZALKA, Peter
Priority to US13/939,245 priority Critical patent/US9380654B2/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to TW103123309A priority patent/TWI620464B/zh
Priority to BR112016000425A priority patent/BR112016000425A8/pt
Priority to CN201480039568.2A priority patent/CN105359626A/zh
Priority to PCT/US2014/045841 priority patent/WO2015006385A1/fr
Priority to CN201910689103.6A priority patent/CN110636663A/zh
Priority to JP2016525440A priority patent/JP6505096B2/ja
Priority to EP14744410.3A priority patent/EP3020255A1/fr
Priority to CA2917760A priority patent/CA2917760C/fr
Publication of US20150015150A1 publication Critical patent/US20150015150A1/en
Publication of US9380654B2 publication Critical patent/US9380654B2/en
Application granted granted Critical
Assigned to CURRENT LIGHTING SOLUTIONS, LLC F/K/A GE LIGHTING SOLUTIONS, LLC reassignment CURRENT LIGHTING SOLUTIONS, LLC F/K/A GE LIGHTING SOLUTIONS, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GENERAL ELECTRIC COMPANY
Assigned to ALLY BANK, AS COLLATERAL AGENT reassignment ALLY BANK, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: CURRENT LIGHTING SOLUTIONS, LLC
Assigned to ALLY BANK, AS COLLATERAL AGENT reassignment ALLY BANK, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: CURRENT LIGHTING SOLUTIONS, LLC
Assigned to ALLY BANK, AS COLLATERAL AGENT reassignment ALLY BANK, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: CURRENT LIGHTING SOLUTIONS, LLC
Assigned to ALLY BANK, AS COLLATERAL AGENT reassignment ALLY BANK, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: CURRENT LIGHTING SOLUTIONS, LLC, DAINTREE NEETWORKS INC., FORUM, INC., HUBBELL LIGHTING, INC., LITECONTROL CORPORATION
Assigned to ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT reassignment ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CURRENT LIGHTING SOLUTIONS, LLC, DAINTREE NETWORKS INC., FORUM, INC., HUBBELL LIGHTING, INC., LITECONTROL CORPORATION
Assigned to CURRENT LIGHTING SOLUTIONS, LLC, FORUM, INC. reassignment CURRENT LIGHTING SOLUTIONS, LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: ALLY BANK
Assigned to CURRENT LIGHTING SOLUTIONS, LLC, FORUM, INC. reassignment CURRENT LIGHTING SOLUTIONS, LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: ALLY BANK
Assigned to ALLY BANK, AS COLLATERAL AGENT reassignment ALLY BANK, AS COLLATERAL AGENT CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT NUMBER 10841994 TO PATENT NUMBER 11570872 PREVIOUSLY RECORDED ON REEL 058982 FRAME 0844. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Assignors: CURRENT LIGHTING SOLUTIONS, LLC, DAINTREE NETWORKS INC., FORUM, INC., HUBBELL LIGHTING, INC., LITECONTROL CORPORATION
Assigned to ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT reassignment ATLANTIC PARK STRATEGIC CAPITAL FUND, L.P., AS COLLATERAL AGENT CORRECTIVE ASSIGNMENT TO CORRECT THE PATENT NUMBER PREVIOUSLY RECORDED AT REEL: 059034 FRAME: 0469. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY INTEREST. Assignors: CURRENT LIGHTING SOLUTIONS, LLC, DAINTREE NETWORKS INC., FORUM, INC., HUBBELL LIGHTING, INC., LITECONTROL CORPORATION
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B33/0809—
    • H05B33/0803—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y02B20/386—

Definitions

  • the present invention relates generally to replacement solutions for LED lamps. More particularly, the present invention relates to LED replacement drivers for electronic ballasts in linear fluorescent lamps (LFLs).
  • LFLs linear fluorescent lamps
  • ballasts and other components break down and require replacement, repair of the fluorescent light can be costly in terms of both parts and labor. Also, disposal of fluorescent lamps raises environmental issues because of their mercury content.
  • LED lamps are now widely accepted as a more efficient and environmental friendly light source than fluorescent lamps.
  • LED lamps allow electrical current to pass through the device in one direction while blocking current flow in the opposite direction.
  • LED lamps provide many advantages as a lighting alternative compared to fluorescent lamps. Some benefits of using LED lamps include no mercury, operation in extreme cold conditions, longer life, and better energy efficiency.
  • ballasts are switch start (preheat), rapid start, program start, and instant start.
  • a switch start (preheat) electromagnetic ballast uses a combination filament-cathode at each end of the lamp in conjunction with a starter switch that initially connects the filaments in series with the ballast, thereby preheating the filaments prior to striking an arc tube.
  • the starter switch closes, permitting a heating current to flow through each electrode.
  • the starter switch triggers the supply voltage to be applied across the arc tube to initiate the discharge.
  • the electrode heating power is turned off after the lamp discharge is initiated.
  • a rapid start electronic ballast uses filament power windings within the ballast to provide a low voltage to the lamp prior to lamp ignition.
  • the ballast applies voltage and heats the cathode simultaneously.
  • the rapid start electronic ballast continues to heat the lamp electrodes even after the lamp is started.
  • Program start electronic ballasts include circuitry to preheat the lamp filaments to apply cathode heat before lamp ignition, and then remove it once the lamp is ignited.
  • the ballast applies power to the filaments first, then after a short delay to allow the cathodes to preheat, applies voltage to the lamps to strike an arc.
  • Instant start electronic ballasts do use filaments to provide ignition.
  • the ballasts of these tubes do not preheat the electrodes. Rather, they use a high voltage to break down the gas and mercury column to initiate the discharge arc.
  • These tubes can be identified by a single pin at each end of the tube or a shunted lamp holder.
  • Embodiments of the present invention provide a replacement driver circuit.
  • the driver circuit includes an input port configured for coupling to a ballast and a transformer having a first side coupled to the input port.
  • the driver circuit also includes a rectifier having an input portion coupled to a second side of the transformer and an output portion configured for coupling to a light source.
  • the transformer is configured to match output characteristics of the ballast to input characteristics of the light source.
  • the illustrious embodiments of the present invention provide a low-cost driver solution for LFL LED replacement lamps for electronic ballasts that eliminate the need for significant modification to the lamp's fixture.
  • the embodiments enable the design of LFL replacement LED lamps, particularly those with rapid start, and program start ballasts, extending the market niche for LFL replacement solutions.
  • aspects of the illustrious embodiments are also particularly well-suited for use with series connected LFL tubes (e.g. 2 ft. LFL tubes used in four tube office fixtures).
  • the series connected fixtures are commonly used in office buildings throughout the world.
  • FIG. 1 is a block diagram illustration of a LED replacement solution in a conventional magnetic ballast application.
  • FIG. 2 is a block diagram illustration of another LED replacement solution in a conventional magnetic ballast application.
  • FIG. 3 is a block diagram illustration of a LED replacement solution constructed and arranged in accordance with an embodiment of the present invention.
  • FIG. 4 is a schematic diagram illustration of the LED driver in the circuit of FIG. 3 constructed and arranged in accordance with the embodiments.
  • FIG. 5 is a flowchart of an exemplary method of practicing an embodiment of the present invention.
  • FIGS. 1-2 are conventional implementations of LFL LED replacement circuits.
  • FIG. 1 is a block diagram illustration of an LFL LED replacement circuit 100 for a conventional magnetic ballast application. More particularly, the circuit 100 is a physical solution for replacement of an LFL LED, such as a T8 tube.
  • a single-ended power supply input 102 at one end of an LED tube 104 , provides power for the circuit 100 .
  • An opposite end 105 of the tube 104 is shunted.
  • a shunted or a dummy starter 106 that shorts the circuit 100 .
  • a phase shifting capacitor 108 Also included is a phase shifting capacitor 108 .
  • An LED driver 110 regulates driving current to LEDs (not shown) connected to the LED driver 110 .
  • LED drivers such as the LED driver 110 , have output characteristics that are matched to the desired output performance parameters of their associated LEDs.
  • the circuit 100 requires a new user to modify the lamps fixture before it can be used.
  • the starter (not shown) must be replaced.
  • the circuit 100 is primarily used with magnetic/switch start ballasts. Additionally, the circuit 100 can be used only in conventional electromagnetic switch start applications. Given this limited applicability, the circuit 100 is useful in only a small portion of the LFL LED replacement market.
  • FIG. 2 is a block diagram illustration of another LFL LED replacement circuit 200 that can be used for conventional magnetic ballast applications.
  • the replacement circuit 200 also includes a single double-ended power supply input 202 at one end of an LED tube 204 .
  • an opposite end 206 is open.
  • An LED driver 208 performs power regulation and parameter matching.
  • the LED replacement circuit 200 requires significant rewiring prior to use. Such rewiring cannot easily and safely be performed by a typical user, and usually requires an experienced electrician to perform the replacement. Additionally, the electrical regulations of many countries restrict the use of this type circuit, thereby limiting its applicability primarily to U.S. markets.
  • the LFL LED replacement circuits 100 and 200 are both generally configured for use with double-ended power supplies. Doubling the power supplies, however, is generally considered unsafe. This safety risk is attributable to the possibility of a shock during replacement.
  • FIG. 3 is a block diagram illustration of a LED replacement circuit 300 constructed in accordance with an embodiment of the present invention.
  • the circuit 300 works with electronic ballasts and leverages the current limiting capability of existing ballast fixtures. Additionally, the circuit 300 does not require the user, or other person, to modify the lamps fixture prior to use. Additionally, the circuit 300 is a double-ended power input configuration included tubes for connection serially. This type fixture is widely used in offices, for example, in 2 ⁇ 2 foot fixtures and a variety of other existing off-the-shelf lamp fixtures.
  • the circuit 300 includes a first input terminal 302 to receive power from an output terminal of a power supply (e.g., an electronic ballast output) to activate an LFL tube 303 . Also included is a second input terminal 304 configured for connection to another power supply.
  • An LED driver 305 performs power regulation and parameter matching between a ballast output and the input parameters required to drive a lighting source, such as LEDs.
  • a single transformer is used to adjust the power to the LEDs.
  • FIG. 4 is a detailed schematic diagram illustration of an exemplary driver circuit 400 .
  • the driver circuit 400 includes a more detailed illustration of the LED driver 305 , in the LFL tube 303 of FIG. 3 .
  • the driver circuit 400 uses a single transformer 402 to match output characteristics of an electronic ballast 403 to parameters required operate an LED array 404 .
  • the driver circuit 400 can be used with serially connected LFL tubes, such as two foot LFL tubes at are commonly used in four tube office fixtures.
  • Resistors 406 form an input port for the driver circuit 400 and receive an alternating current (AC) voltage output from the electronic ballast 403 .
  • An inductor 407 limits current and provides other adjustments necessary for the AC voltage before passing to the transformer 402 .
  • the transformer 402 reduces the AC voltage received from the ballast 403 to a level ultimately suitable for use as a power source for the LED array 404 .
  • a rectifier 408 converts the AC voltage from the ballast 403 into a direct current (DC) voltage for input into the LED array 404 .
  • the rectifier 408 permits the voltage flowing therethrough to flow in only one direction along a circuit path to the LEDs.
  • the rectifier 408 can be implemented as a diode bridge, or some other suitable component.
  • a capacitor 410 enhances performance of the LED array 404 by filtering out spikes and smoothing for the DC voltage that drives the LEDs.
  • the exemplary driver circuit 400 includes specific components, the driver circuit 400 is merely one approach of matching output characteristics of an electronic ballast, such as the ballast 403 , to parameters required to operate an LED array, such as the LED array 404 .
  • Other approaches would be readily apparent to one of skill in the art and would be within the spirit and scope of the present invention.
  • the exemplary driver circuit 400 is used for matching and separating the input to the LED array 404 from and to the output from the ballast 403 .
  • a single transformer could separate and completely isolate the two sides of the driver circuit (the ballast output in the LED input) between the ballast and the LED array.
  • one transformer can be used to perform the separating function while the matching of the parameters could be achieved using modulation techniques, such as pulse code modulation (PCM), pulse width modulation (PWM), and frequency modulation.
  • PCM pulse code modulation
  • PWM pulse width modulation
  • frequency modulation such as frequency modulation
  • FIG. 5 is a flowchart of an exemplary method 500 of practicing an embodiment of the present invention.
  • a first type voltage is received as an output from a ballast on one side of only one transformer, the transformer being configured to adjust a level of the receive voltage.
  • the first type voltage is converted to a second type voltage.
  • the second type voltage is provided as an input to the LED array any manner responsive to input characteristics thereof.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
US13/939,245 2013-07-11 2013-07-11 Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps Active 2033-12-31 US9380654B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US13/939,245 US9380654B2 (en) 2013-07-11 2013-07-11 Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps
TW103123309A TWI620464B (zh) 2013-07-11 2014-07-07 用於線性螢光燈的發光二極體燈置換驅動器
CA2917760A CA2917760C (fr) 2013-07-11 2014-07-09 Circuit d'attaque de rechange de lampe a diode electroluminescente (led) pour lampes fluorescentes lineaires
CN201480039568.2A CN105359626A (zh) 2013-07-11 2014-07-09 用于线性荧光灯的发光二极管（led）灯置换驱动器
BR112016000425A BR112016000425A8 (pt) 2013-07-11 2014-07-09 circuito acionador de substituição e método para fornecer potência
PCT/US2014/045841 WO2015006385A1 (fr) 2013-07-11 2014-07-09 Circuit d'attaque de rechange de lampe à diode électroluminescente (led) pour lampes fluorescentes linéaires
CN201910689103.6A CN110636663A (zh) 2013-07-11 2014-07-09 用于线性荧光灯的发光二极管（led）灯置换驱动器
JP2016525440A JP6505096B2 (ja) 2013-07-11 2014-07-09 直管型蛍光ランプのための発光ダイオード（ｌｅｄ）ランプ置換えドライバ
EP14744410.3A EP3020255A1 (fr) 2013-07-11 2014-07-09 Circuit d'attaque de rechange de lampe à diode électroluminescente (led) pour lampes fluorescentes linéaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/939,245 US9380654B2 (en) 2013-07-11 2013-07-11 Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps

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US20150015150A1 US20150015150A1 (en) 2015-01-15
US9380654B2 true US9380654B2 (en) 2016-06-28

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US13/939,245 Active 2033-12-31 US9380654B2 (en) 2013-07-11 2013-07-11 Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps

Country Status (8)

Country Link
US (1) US9380654B2 (fr)
EP (1) EP3020255A1 (fr)
JP (1) JP6505096B2 (fr)
CN (2) CN105359626A (fr)
BR (1) BR112016000425A8 (fr)
CA (1) CA2917760C (fr)
TW (1) TWI620464B (fr)
WO (1) WO2015006385A1 (fr)

Cited By (2)

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US9713236B1 (en) * 2016-09-07 2017-07-18 Elb Electronics, Inc. Solid-state lighting arrangement with startup delay circuit
US11649952B2 (en) 2016-02-24 2023-05-16 Power Concepts, Llc Ceiling light LED retrofit kit

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US9318107B1 (en) 2014-10-09 2016-04-19 Google Inc. Hotword detection on multiple devices
US9557044B2 (en) * 2014-10-20 2017-01-31 Energy Focus, Inc. LED lamp with dual mode operation
WO2017146056A1 (fr) * 2016-02-24 2017-08-31 三菱電機株式会社 Système de lampe, dispositif d'éclairage, procédé de fabrication de système de lampe et procédé d'assemblage de dispositif d'éclairage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11649952B2 (en) 2016-02-24 2023-05-16 Power Concepts, Llc Ceiling light LED retrofit kit
US9713236B1 (en) * 2016-09-07 2017-07-18 Elb Electronics, Inc. Solid-state lighting arrangement with startup delay circuit

Also Published As

Publication number Publication date
WO2015006385A1 (fr) 2015-01-15
JP6505096B2 (ja) 2019-04-24
JP2016527677A (ja) 2016-09-08
TW201507545A (zh) 2015-02-16
EP3020255A1 (fr) 2016-05-18
BR112016000425A8 (pt) 2020-01-07
CA2917760A1 (fr) 2015-01-15
CN110636663A (zh) 2019-12-31
US20150015150A1 (en) 2015-01-15
TWI620464B (zh) 2018-04-01
BR112016000425A2 (pt) 2017-07-25
CN105359626A (zh) 2016-02-24
CA2917760C (fr) 2018-06-12

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